bash grep文件目录

Question

I want to grep 'run' numbers in some files eg

files/run3/testlog
files/run14/testlog
files/run28/testlog

I have the following code:

for f in $(find . -name testlog)
do
     echo $(pwd) | egrep -o run[0-9]{*}
done

I want my code to output:

run3
run14
run28

However I am not getting any output.

Answer 1

I think the problem are the curly brackets around *, just try egrep -o run[0-9]* .

If you don't want to match "run", try egrep -o run[0-9]+ .

Answer 2

You need to replace ${pwd} with $f and should quote the regular expression.

I would use sed and avoid the for loop (but you can also use grep -o, if you use the pattern correctly, ie without braces)

find . -name testlog -print | sed -n 's/.*\/\(run[0-9]*\)\/testlog/\1/p'

or

find . -name testlog -print | grep -o 'run[0-9]+'

Answer 3

Try this:

for f in $(find . -name testlog)
do
     echo $(basename $(dirname $f))
done